|
342
|
1 /*
|
|
|
2 * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved.
|
|
|
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
|
4 *
|
|
|
5 * This code is free software; you can redistribute it and/or modify it
|
|
|
6 * under the terms of the GNU General Public License version 2 only, as
|
|
|
7 * published by the Free Software Foundation.
|
|
|
8 *
|
|
|
9 * This code is distributed in the hope that it will be useful, but WITHOUT
|
|
|
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
|
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
|
12 * version 2 for more details (a copy is included in the LICENSE file that
|
|
|
13 * accompanied this code).
|
|
|
14 *
|
|
|
15 * You should have received a copy of the GNU General Public License version
|
|
|
16 * 2 along with this work; if not, write to the Free Software Foundation,
|
|
|
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
|
18 *
|
|
|
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
|
|
|
20 * CA 95054 USA or visit www.sun.com if you need additional information or
|
|
|
21 * have any questions.
|
|
|
22 *
|
|
|
23 */
|
|
|
24
|
|
|
25 inline HeapWord* G1OffsetTableContigSpace::allocate(size_t size) {
|
|
|
26 HeapWord* res = ContiguousSpace::allocate(size);
|
|
|
27 if (res != NULL) {
|
|
|
28 _offsets.alloc_block(res, size);
|
|
|
29 }
|
|
|
30 return res;
|
|
|
31 }
|
|
|
32
|
|
|
33 // Because of the requirement of keeping "_offsets" up to date with the
|
|
|
34 // allocations, we sequentialize these with a lock. Therefore, best if
|
|
|
35 // this is used for larger LAB allocations only.
|
|
|
36 inline HeapWord* G1OffsetTableContigSpace::par_allocate(size_t size) {
|
|
|
37 MutexLocker x(&_par_alloc_lock);
|
|
|
38 // This ought to be just "allocate", because of the lock above, but that
|
|
|
39 // ContiguousSpace::allocate asserts that either the allocating thread
|
|
|
40 // holds the heap lock or it is the VM thread and we're at a safepoint.
|
|
|
41 // The best I (dld) could figure was to put a field in ContiguousSpace
|
|
|
42 // meaning "locking at safepoint taken care of", and set/reset that
|
|
|
43 // here. But this will do for now, especially in light of the comment
|
|
|
44 // above. Perhaps in the future some lock-free manner of keeping the
|
|
|
45 // coordination.
|
|
|
46 HeapWord* res = ContiguousSpace::par_allocate(size);
|
|
|
47 if (res != NULL) {
|
|
|
48 _offsets.alloc_block(res, size);
|
|
|
49 }
|
|
|
50 return res;
|
|
|
51 }
|
|
|
52
|
|
|
53 inline HeapWord* G1OffsetTableContigSpace::block_start(const void* p) {
|
|
|
54 return _offsets.block_start(p);
|
|
|
55 }
|
|
|
56
|
|
|
57 inline HeapWord*
|
|
|
58 G1OffsetTableContigSpace::block_start_const(const void* p) const {
|
|
|
59 return _offsets.block_start_const(p);
|
|
|
60 }
|
